Since I have 2 other Windows 8.1 installations on the same hardware I fired one of these up and checked, thinking first since they both didn't have this problem I'd just Export whatever they had and Import that into the WinToUSB installation? Well, neither even had the HKLM\Software\Policies\Google key! And neither does 2 Windows 7 Home Premium installations and 1 XP installation. So I Exported it from WinToUSB just to be sure and then Deleted it there. Fixing the problem.

You see, the "Google Update Policy settings" can't be "inconsistent" if there aren't any!

Thinking this over later, Windows-To-Go comes from the Enterprise edition of Windows which also includes the Group Policy Editor. This version deals with all the multiple installations in offices, etc. I bet WinToUSB got the Google policy key from there? But anyway, it just doesn't apply to the vast majority of Home version users.

Aside, I have installed the Group Policy Editor (both 32 and 64 bit versions) on Windows 7 Home Premium. It's fairly simple once you get the files together. But haven't used it since either, and so haven't even bothered on 8.1.

Since the WinToUSB administrator couldn't bother to read an initial request for help, by replying "what can I do for you" above the request! And not even replying to a second. I'm hoping he doesn't bother to read this either, as it could be considered helpful? It's posted here for other User's benefit.